Manufacture of rubber hose.



H. Z. COBB.

MANUFACTURE OF RUBBER HOSE.

APPLICATION FILED MAR.26, 1912.

1,1 10,671 m Patented Sept. 15, 1914.

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HENRY ZENAS COBB, 0F WINCHESTER,- MASSACHUSETTS.

MANUFACTURE OF RUBBER HOSE.

Specification of Letters Patent. 6

Patented Sept. .15, Tera.

Application filed March 26, 1912. Serial No. 686,304.

7 '0 all whom it may concern.-

Be it known that I, HENRY ZENAS COBB, a citizen of the United States,residing at Winchester, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements in theManufacture of Rubber Hose, of which the following is a specification.

This invention relates to an apparatus for applying to a textile envelopor hose, a coating of rubber or analogous composition impregnating suchtextile web. The composition emplo ed is of dense consistency analogousto t at of dough, and is commonly referred to as friction dough.

According tothe present invention the plastic composition or dough isintroduced while the fabric is being formed by braiding or analogousoperati0n,-in such manner as to maintain amass'of the plastic materialwhich is intersected by the converging yarns which are on their way toform the web.

Thus the yarns ar igcompelled to travel 5 through the mass of materialand thus become impregnated therewith. The web thus formed carries withit a considerable excess 1 of the plastic material, which is firstpreferablysnieared or rubbed into the interstices enters through acentral die z'. The top of of the web, and then the excessis'wiped offby passinfgthe tubular web or hose through a close fitting wiper die.

The present invention constitutes an imv provement upon thatset forth inmy Patent: No. 1,002,644 granted September 5', 1911.- According to thatinvention the rubber hose or core is passed through a coating devicecoating chamber his located much higher whereby a thin coating ofplastic material is formed upon the core, which then is carried 5 somedistance through the braiding machine and then receives the braided web,and 1 passes thence through a wiper die which wipes ofi? the excess ofcoating material, and forms this excess into a mass through which theCOIFJGIglIIg yarns pass. thus has time to partially dry between thepoint of application and the place where the braiding is performed. Bymy present invention the plastic material is introduced directly beneaththe braiding point, so that when traversed by the yarns it is of thesame consistency as when delivered by the forcing means which feeds thematerial.

Preferably provision is made for wiping ofl:' and removing the excess ofplastic ma- .terialgwhich is returned to the reservoir of such materialor is otherwise conducted out The coating of the machine. presentapparatus is identical with that set forth in my application No. 651,969filed September 29, 191-1 (on which Patent No. 1,039,697 dated October1, 1912, has issued). The accompanying drawing is a vertical iridsectionthrough the braiding and coating machine, being a View analogous toFigure 1 in said Patent No. 1,002,644.

Referring to the drawing, the parts iden-. tical with those in myaforesaid patent are designated by the same letters.

A designates as a whole the braiding machine, and I the rubber coatingdevice. The braiding machine is of usual construction, comprising upperand lower race plates a b and bobbins 0 c from which the yarns (Z dconverge to the braiding point. The machine is driven by power appliedto a belt pulley (a, which through a clutch f drives a As to thisfeature myf'? main shaft from which the other parts the coating chamberis formed of a cap h having a central opening through which the hosepasses, and having also preferably surrounding perforations throughwhich the plastic material may exude. This cap h is located directlybeneath the net of converging yarns d. Thus the than in my previouspatent. The coated hose C passes through a compound die D which is shownas of the same construction as in my said patent No. 1,039,697. Itcomprises a lower smearing die I) and an upper wiper die D The smearingdie is so large as to admit the coated hose without wiping off thecoating, its function being simply to smooth or rub the coating into theinterstices of the fabric. The upper die D is smaller and makes a tightfit with the hose, its function being to rub or wipe 01f the excessofcoating and direct such excess down through the chute or spout E,whenccit is carried away. The hose C emerging from this die thus carriesno excess of oating material, and after dryingis ready to be vulcanized.

, For feeding the rubber composition or end draws the doughfrom. thebottom of'a hopper s and at the other end discharges it into an uprightconve er comprising a screw q and easing 1" whic elevates the materialand forces it thence through a lateral branch 1' into the coatingchamber 71.. The two conveyer shafts are geared together and the shaft 9is rotated by power taken from an upper shaft t of the braider whichthrough a chain u drives a sprocket wheel on a transverse shaft'v whichpasses through the hopper and has stirring arms for agitating the doughin the hopper, and from this shaft another s rocket chain w drives theconveyer sha .t 9. For returning the excess of material from the spoutE, another conveyer F is provided of similar construction, driven by achain t from the shaft t, and from this conveyer a spout F carries thedough back into the hopper 8.

In operation, the plastic coating material or dough being forced intothe chamber-1h under suitable pressure, slowly flows out therefromthrough the perforations in the cap h and forms a semi-solid ordoughlike mass p above this cap, which mass is thick enough to beintersected by the net work of converging yarns d. As these yarns aremoving constantly around the braiding point, they not only cut their waythrough this mass and keep it stirred, but they also tend to carry thecoating material toward the braiding point, while becoming themselvescoated and impregnated therewith. Any tendency of the doughy material tooverflow and run down the sides of the chamber h is overcome by thisconverging movement of the yarns.- At the same time the rate of feed isso regulated that the material is not supfplied in such excess as wouldforce it to over ow. v

The result of the coating and braiding operations is that the rubbercomposition is caused to permeate the yarns and to penetrate theinterstices of the braided fabric or braiding point it carries on thesurface of 4 its web an irregular excess of coating material. As itenters the smearing die D this i excess is smoothed and rubbed into theinterstlces of the web. Then as the hose en-,

ters the smaller wiping die D the superficial material is rubbedofi,leaving only that which remains in the interstices of the I web. Theexcess of material overflows from The particular means for forcin thecoat ingmaterial into thechamber h 15 not important, and the means shownmay be substituted by otherswithout affecting my invention.

My'invention is susceptible of considerable modification in structuralfeatures and arrangenleent, without aifecting its novel and characteistic features which are set forth in the claims which follow.

moving an excess of such material fromthe' surface of the web.

2. The process of making hose which consists in braiding yarns into anascending tubular textile web while introducing adense plastic materialdirectly beneath the braiding point, and maintaining amass of suchmaterial through which the yarns pass on their way to form the web,whereby the yarns are impregnated with such material, then smoothing thematerial carried on the surface of the web, and finally removing theexcess of such material from the web.

3. An apparatus for making hose coma prising means for braiding anascending tubular textile web, and means for simultaneously introducinga dense plastic material directly beneath the braiding point,

adapted to maintain a mass of such material intersected by the yarns,whereby the yarns pass through such mass on their way to form the web,means for smoothing the material carried on the surface of the Web, andmeans for subsequently removing the excess of such material from theweb.

prising means for braiding an ascending tubular textile web, and meansfor simultaneously introducing a dense plastic material directly beneaththe braiding point, comprising a coating chamber through which the corepasses, located with its. top just beneath the converging yarns, andforca .4..An apparatus for making hose comv ing means for. feeding thematerial into such chamber at such rate as to maintain a mass ofmaterial overlying the chamber and intersected by the yarns.

In witness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses.

. HENRY ZENAS COBB. Witnesses EDWIN L. STIOKNEY, FnANK J. Wnsrwoon.

